Object spotted overhead very high and lit bright and dimming as it moved across the sky.

While relaxing in our backyard my wife and I were observing a passenger jet flying approaching us from east to west. While observing the jet I noticed moving pinprick of bright light very much higher than the jet. The jet passed and I observed this object flashing at first very bright and then dimming (it was still lit,but dimly). I pointed this object out to my wife and she observed it,as well. We both agreed that this was not a mylar party balloon which we had seen together many years ago. The. object continued to move, apparently slowly eat to west. we both agreed that it seemed to be moving too slow to be flying. We observed no contrail and heard no sound. As I said,the object was very tiny and we assumed it was very high not low and small. We were able to watch it as it moved east to west, directly overhead and then into the wester sky. We both agreed we had never observed something moving in this way or displaying this kind of bright light dimming and flashing bright again. I did take 2 picture and about 20 seconds of video, but nothing showed up when I looked at them. We both felt this was something perhaps apps explainable but unique.